On Mon, Aug 21, 2017 at 8:57 PM, David Turner <[email protected]> wrote:
> It is not recommended to get your cluster more than 70% full due to > rebalancing and various other reasons. That would change your 12x 10TB > disks in a host to only be 84TB if you filled your cluster to 70% full. I > still think that the most important aspects of what is best for you hasn't > been provided as none of us know what type of CephFS usage you are planning > on. Are you writing once and reading forever? Using this for home > directories? doing processing of files in it? etc... Each instance is > different and would have different hardware and configuration requirements. > > > Hi David, The planned usage for this CephFS cluster is scratch space for an image processing cluster with 100+ processing nodes. My thinking is we'd be better off with a large number (100+) of storage hosts with 1-2 OSD's each, rather than 10 or so storage nodes with 10+ OSD's to get better parallelism but I don't have any practical experience with CephFS to really judge. And I don't have enough hardware to setup a test cluster of any significant size to run some actual testing. Thanks, Nick
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